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Cracked it at last using Nano vna. Analysis shows cut length of 16feet and 6 inches is too long as resonates at 13.198MHz and not my target of 14.175. Reverse maths gives a constant of 218 (resonant

Or use a tuner at the feedpoint. Small changes in resonant frequency (10%) are easily tuned out with minimal loss. Even with a feedline, and tuner at the radio end, the losses are small.

The formula (feet)=234/MHz for a quarter wavelength is just a rough starting point. The resonant length is affected by many variables, like conductor diameter and the placement of nearby conductors

This can be a problem... Some installers are less than smart, and copy all the files into a new directory each time, add that directory to the path that python searches, and then that longer path gets

If you would take your existing board and use a sharp knife to remove the excess copper you might get a better result, or at least see what changes occur. Trimming the connector pins back will also

Hi Thanks a lot for your responses. Jim, I was not aware that Er would potentially drop significantly by frequency. I will check if data exists for Er vs frequency. Thanks. Donald, good point on the

Since I switched to nanovna-saver 0.3.10 -win7 the display time of the "console" window remains displayed for 12 seconds. Previously with version 0.3.8 it was only 3 seconds. It really is a great

I think the startup delay has a lot to do with what version of windows you are using. Mine used to start up fast like that, 3sec or so - but after the latest Saver update, which happened to coincide

Sounds like you have a lot of overhead background running, or slow/low resources, or both. Mine launches within a few seconds of the DOS terminal. Stephen W9SK

Mine starts goes to DOS window and then windows window in under 3 seconds.Add some laser oil to your dilithium crystals.....or how much stuff is in your process table

I had not waited long enough, it did take a while and did pop up and run successfully. Thanks to all who replied. ----- Glen Jenkins, WB4KTF, Austin, TX

As I recall, 50 ohms on 1 ounce copper on an 0.031" board with epsilon=2.5 as microstripline was 0.1" wide. There's countless calculators out there. If you pick the board correctly, a 4 pin SMA

ONLY if you test that coupon at 2,400,000,000 Hz! Testing with the typical C Meter won't do it!?? The usual standard is 1000 Hz. The Er changes with frequency when you get in the MHz.and up.??

Copper-clad steel and woven copper (with a plastic covering or not) are other good choices for antenna wire. People have even used aluminum electric fence wire and horse fence wire with some success.

At a glance I noticed the wide traces at the connector pins, which are excess capacitance. Unless there is a compelling reason to do otherwise I tend to select a dielectric material whose 50Ω width

Especially the long waiting time is where many users think its not working... Yes it takes a loooong while :-) Dg9bfc sigi Am 28.07.2022 00:05 schrieb Stan Dye <standye@...>:

Most people do a test coupon, which is essentially what you're doing. Rogers Duroid(tm) is an example. It also has low loss at microwave frequencies - the issue is the glass in FR-4. Taconic is

Mine goes blank for a short while and then opens ?

The best is Copperweld wire which is a steel wire with heavy copper plating. You get the strength and low cost of steel with the electrical conductivity and corrosion resistance of copper. SherpaDoug,

I watched the video of how that calculator works and it is a mechanical nightmare. Yes it surely is a different kind of calculator, but God help you if for some reason it quit calculating correctly.